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Home >> Infiniti >> 2007 >> M45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (VK45DE) >> Trouble Diagnosis >> ECM Terminals and Reference Value >> ECM Inspection Table
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ECM Inspection Table

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT-II.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
ECM INSPECTION CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
1 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
2 SB A/F sensor 1 heater (bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
G05210381Courtesy of NISSAN NORTH AMERICA, INC.
3 R Throttle control motor relay power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
4 W Throttle control motor (Close) [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Released
G04900086Courtesy of NISSAN NORTH AMERICA, INC.
5 B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
G04900087Courtesy of NISSAN NORTH AMERICA, INC.
6 R/L Heated oxygen sensor 2 heater (bank 1) [Engine is running] 
  • Engine speed: Below 3, 600 rpm after the following conditions are met
    • Engine: After warming up
    • Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - 1.0V
[Ignition switch: ON] 
  • Engine: Stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
10 W/G Intake valve timing control solenoid valve (bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000rpm
G04900088Courtesy of NISSAN NORTH AMERICA, INC.
11 G/O Intake valve timing control solenoid valve (bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000rpm
G04900088Courtesy of NISSAN NORTH AMERICA, INC.
12 R/G Power steering pressure sensor [Engine is running] 
  • Steering wheel: Being turned
 0.5 - 4.5V
[Engine is running] 
  • Steering wheel: Not being turned
 0.4 - 0.8V
13 W/R Crankshaft position sensor (POS) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900090Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04900091Courtesy of NISSAN NORTH AMERICA, INC.
14 G Camshaft position sensor (PHASE) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900092Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04900093Courtesy of NISSAN NORTH AMERICA, INC.
15 W Knock sensor (bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5V
16 W/L A/F sensor 1 (bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 3.1V
35 GR/L Approximately 2.6V
56 LG/B Approximately 2.3V
75 Y Approximately 2.3V
21
22
23
40
41
42
44
63		 W/B
R/Y
R/B
V/R
P/L
R/W
O
G/Y		 Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
Fuel injector No. 7
Fuel injector No. 8		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900345Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900346Courtesy of NISSAN NORTH AMERICA, INC.
24 SB A/F sensor 1 heater (bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
G05210381Courtesy of NISSAN NORTH AMERICA, INC.
25 P/B Heated oxygen sensor 2 heater (bank 2) [Engine is running] 
  • Engine speed: Below 3, 600 rpm after the following conditions are met
    • Engine: After warming up
    • Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - 1.0V
[Ignition switch: ON] 
  • Engine: Stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
29 V VIAS control solenoid valve [Engine is running] 
  • Selector lever: P or N
 0 - 1.0V
[Engine is running] 
  • Selector lever: D
  • Engine speed: Below 5, 000 rpm
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Engine speed: Above 5, 000 rpm
 0 - 1.0V
32 R/G EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
34 Y/G Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with intake air temperature.
36 W Knock sensor (bank 2) [Engine is running] 
  • Idle speed
 Approximately 2.5V
38 G/B Fuel pump control module (FPCM) check [When cranking engine]  Approximately 0V
[Engine is running] 
  • Warm-up condition 
  • Idle speed
 4 - 6V
39 B/R Fuel pump control module (FPCM) [When cranking engine]  0 - 0.5V
[Engine is running] 
  • Warm-up condition 
  • Idle speed
 8 - 12V
45 V EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting
G04900099Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine)
G04900100Courtesy of NISSAN NORTH AMERICA, INC.
46
60
61
62
65
79
80
81		 L/O
V/W
P
Y/R
BR/R
GR/R
GR/B
G/R		 Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1
Ignition signal No. 8
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G04900803Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900804Courtesy of NISSAN NORTH AMERICA, INC.
47 G Sensor power supply
(Throttle position sensor)		 [Ignition switch: ON]  Approximately 5V
48 BR Sensor power supply
(EVAP control system pressure sensor)		 [Ignition switch: ON]  Approximately 5V
49 B/Y Sensor power supply
(Refrigerant pressure sensor, Battery current sensor)		 [Ignition switch: ON]  Approximately 5V
50 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75V
51 W Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0.9 - 1.2V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 1.6 - 0.9V
53 LG Intake valve timing control position sensor (bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
G05210397Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G05210398Courtesy of NISSAN NORTH AMERICA, INC.
55 L/R Heated oxygen sensor 2 (bank 1) [Engine is running] 
  • Revving engine from idle to 3, 000 rpm quickly after the following conditions are met.
    • Engine: After warming-up
    • Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - Approximately 1.0V
57 BR/W A/F sensor 1 (bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 2.6V
58 G/O Approximately 2.3V
76 G/W Approximately 3.1V
77 GR Approximately 2.3V
66 B Sensor ground
(Throttle position sensor)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
67 B/W Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
68 L/Y Sensor power supply
(Power steering pressure sensor)		 [Ignition switch: ON]  Approximately 5V
69 R Throttle position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36V
70 L/R Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower fan motor switch: ON (Compressor operates)
 1.0 - 4.0V
71 L/R Battery current sensor [Engine is running] 
  • Battery: Fully charged(1)
  • Idle speed
 Approximately 2.6 - 3.5V
72 L Intake valve timing control position sensor (bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
G05210397Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000rpm
G05210398Courtesy of NISSAN NORTH AMERICA, INC.
73 Y/B Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with engine coolant temperature.
74 W Heated oxygen sensor 2 (bank 2) [Engine is running] 
  • Revving engine from idle to 3, 000 rpm quickly after the following conditions are met
    • Engine: After warming-up
    • Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - Approximately 1.0V
78 B Sensor ground
(Heated oxygen sensor 2)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
82 W Sensor ground
(APP sensor 1)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
83 P Sensor ground
(APP sensor 2)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
85 V Data link connector [Ignition switch: ON] 
  • CONSULT-II or GST: Disconnected
 Approximately 5V - Battery voltage (11 - 14V)
86 P CAN communication line [Ignition switch: ON]  Approximately 1.1 - 2.3V
Output voltage varies with the communication status.
90 L Sensor power supply
(APP sensor 1)		 [Ignition switch: ON]  Approximately 5V
91 BR Sensor power supply
(APP sensor 2)		 [Ignition switch: ON]  Approximately 5V
94 L CAN communication line [Ignition switch: ON]  Approximately 2.6 - 3.2V
Output voltage varies with the communication status.
98 R Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully released
 0.20 - 0.55V
[Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully depressed
 1.85 - 2.40V
99 G/Y ICC steering switch (models with ICC system) [Ignition switch: ON] 
  • ICC steering switch: OFF
 Approximately 4.3V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1.3V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3.7V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 3V
[Ignition switch: ON] 
  • DISTANCE switch: Pressed
 Approximately 2.2V
99 Y ASCD steering switch (models with ASCD system) [Ignition switch: ON] 
  • ASCD steering switch: OFF
 Approximately 4V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 2V
101 V/R Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14V)
102 G PNP switch [Ignition switch: ON] 
  • Selector lever: P or N
 Approximately 0V
[Ignition switch: ON] 
  • Selector lever: Except above
 BATTERY VOLTAGE (11 - 14V)
104 O Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
106 LG Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.4 - 1.1V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 3.7 - 4.8V
107 V/W Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with fuel tank temperature.
108 BR ICC brake switch (models witch ICC system)
ASCD brake switch (models witch ASCD system)		 [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14V)
109 L Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 SB ECM relay
(Self shut-off)		 [Engine is running] 
[Ignition switch: OFF] 
  • For a few seconds after turning ignition switch OFF
 0 - 1.5V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14V)
113 GR Fuel pump relay [Ignition switch: ON] 
  • For 1 second after turning ignition switch ON

[Engine is running] 		 0 - 1.5V
[Ignition switch: ON] 
  • More than 1 second after turning ignition switch ON
 BATTERY VOLTAGE (11 - 14V)
115
116		 B
B		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
117 GR/L EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
119
120		 R
R		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
121 L Power supply for ECM (Back-up) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
(1) Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to "SPECIFIC GRAVITY CHECK ".
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